Harumi, also known as The Quiet One, is the founder and leader, later second-in-command, of the Sons of Garmadon. She appeared in LEGO Ninjago: Masters of Spinjitzu as the main antagonist of Season 8: Sons of Garmadon, as one of the two secondary antagonists (alongside Heavy Metal) of Season 9: Hunted, and as a minor antagonist in Season 12: Prime Empire (albeit as an avatar). Although she at first appears to be a new major character and a potential love interest to Lloyd, she, in fact, wants to resurrect Lord Garmadon without any of his positive characteristics because she believes he is the ruler Ninjago deserves.
She was voiced by Britt McKillip who also voices Princess Cadence in My Little Pony: Friendship is magic.